COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Gas turbine as compared to internal combustion engine

Can be driven at a very high speed

All of the listed here

Has more efficiency

Produces uniform torque

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A rocket engine for the combustion of its fuel

Carries its own oxygen

Uses surrounding air

Uses compressed atmospheric air

Does not require oxygen

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A compressor mostly used for supercharging of I.C. engines is

Roots blower

Axial flow compressor

Radial flow compressor

Reciprocating compressor

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Adiabatic compression is one in which

No heat leaves or enters the compressor cylinder during compression

Temperature during compression remains constant

Temperature rise follows a linear relationship

Work done is maximum

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The thermal efficiency of a gas turbine as compared to a diesel plant is

More

Depends on other factors

Less

Same

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During base load operation, the best method of controlling compressor is

Constant speed unloader

Relief valve

Variable speed

Start-stop motor

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The volumetric efficiency of a compressor

Increases with decrease in compression ratio

Decreases with increase in compression ratio

Increases with increase in compression ratio

Decreases with decrease in compression ratio

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The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One fourth

One sixth

One-half

Same

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The air-fuel ratio in gas turbines is of the order of

50: 1.

30: 1

15: 1

7: 1

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Maximum temperature in a gas turbine is of the order of

1500°C

2000°C

700°C

1000°C

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